Junior Science Light Quiz

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Junior Science light quiz, physics, NZ

• 1.

Tick all the TRUE statements

• A.

The moon does not emit light

• B.

The sun reflects light

• C.

Stars emit light

• D.

Humans do not emit visible light

A. The moon does not emit light
C. Stars emit light
Explanation
'Emit' means put out or produce light

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• 2.

Which one describes WAVELENGTH?

• A.

The distance a light ray travels each second

• B.

The distance between the crest of a wave and the trough (lowest point)

• C.

The distance between Earth and the sun

• D.

The distance between two crests right next to each other in a wave

D. The distance between two crests right next to each other in a wave
Explanation
The correct answer is "the distance between two crests right next to each other in a wave." This is because wavelength refers to the distance between two consecutive crests or troughs in a wave. It is a measure of the spatial extent of one complete cycle of a wave and is commonly represented by the symbol Î» (lambda).

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• 3.

Which is the definition of light?

• A.

The movement of air particles hitting your eardrum

• B.

A force that all objects with mass have

• C.

A type of energy (electromagnetic) that we can detect with our retina

• D.

What all matter is made up of

C. A type of energy (electromagnetic) that we can detect with our retina
Explanation
Light is defined as a type of energy (electromagnetic) that we can detect with our retina. This definition accurately describes light as a form of energy that is visible to us through our sense of sight. Light is a fundamental part of the electromagnetic spectrum and is characterized by its ability to travel in waves and particles called photons. When light enters our eyes, it stimulates the cells in our retina, allowing us to perceive it as different colors and brightness levels.

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• 4.

Humans can see all wavelengths of light

• A.

True

• B.

False

B. False
Explanation
NO: visible light is a very small part of the electromagnetic spectrum (possible wavelengths)

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• 5.

Which is TRUE?

• A.

Light with a shorter wavelength has MORE energy than longer wavelengths

• B.

Light with a shorter wavelength has LESS energy than longer wavelengths

A. Light with a shorter wavelength has MORE energy than longer wavelengths
Explanation
Because it takes more energy for the photon to move up and down more often (shorter wavelength/greater frequency)

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• 6.

The colours of the rainbow are red, orange, yellow, green, blue, ___________ and violet.

indigo
Explanation
The given question asks for the missing color in the sequence of colors of the rainbow. The correct answer is "indigo". The colors of the rainbow, in order, are red, orange, yellow, green, blue, indigo, and violet.

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• 7.

What colour will a BLUE dress look under RED light?

• A.

White

• B.

Black

• C.

Red

• D.

Blue

B. Black
Explanation
Only red light is hitting the object: this is all absorbed by a blue dress.

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• 8.

What colour will a green dress look under blue lights?

• A.

Blue

• B.

White

• C.

Green

• D.

Grey

A. Blue
Explanation
green dresses usually contain blue and yellow and green dyes. Only blue will be reflected back to our eyes if blue light is shone on the dress.

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• 9.

Which one will REFLECT ALL the light that hits it?

• A.

A mirror

• B.

The sun

• C.

Stars

• D.

A red dress

A. A mirror
Explanation
A red dress can only reflect red light; the mirror can reflect any wavelength shone onto it.

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• Current Version
• Mar 20, 2023
Quiz Edited by
ProProfs Editorial Team
• Jun 06, 2017
Quiz Created by
MrsHRobinson

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